Friction-drum



(No Model.)

W. J. GA'RLIN. FBIGTION DRUM.

No. 315,239. Patented Apr. 7, 1885.

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UNITED STATES PATENT OFFICE.

WILLIAM J. CARLIN, OF ALLEGHENY, PENNSYLVANIA.

FRlCTlON-DRUM.

SPECIFICATION forming part of Letters Patent No. 315,239, dated April 7, 1885.

Application sled March 2, 1885. (No model.)

T0 all whom it may concer-1c:

Be it known that I, WILLIAM J. GARLIN, of Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Friction- Drums; and I do hereby declare that the followingis a full, clear, andexact description of the invention, which will enable others skilled .in

the art to which it appertains to make and use v the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention has relation to improvements in friction-drums of that class employed in hoisting-machines, pile-drivers, 85o.; and it consists in the construction, combination, and arrangements of parts for engaging and disengaging the drum from the power, as hereinafter more fully described and claimed.

'Io enable others skilled in the art in which my invention appears, I will now proceed to describe the same, reference being had to the accompanying drawings, which form a part of this specification.

Figure l is an elevation of my improved device; Fig. 2, a plan section through the middle; Fig. 3, an enlarged portion showing position of shafts and pin; Figs. 4 and 5, detail views of the construction I employV to adjust the lever.

Similar letters of reference refer to similar parts throughout the drawings.

A is the drum having at one end the conical flange a, adapted to be forced against or away from the frictioircone D, cast on or attached to the gear-wheel E, which is keyed on a hollow shaft, B, upon which drum A is free to rotate, shaft B being journaled in suitable standards, L L. To standard L', I bolt the yoke M, in which transversely I journal a rock-shaft, N, which passes through the slotted stirrup O, and is keyed or fastened to an eccentric or crank, B, whose periphery is limited by the slot of said stirrup. Upon` rocking the shaft N by a lever, H, (or other means,) the resulting movement of the cam or eccentric P produces a horizontal thrust of the stirrup O in either direction, according to the direction the leverH is given.

To the stirrup O, I fasten in a suitable manner the inner rod or spindle, R, which then passes into the hollow shaft B, and through the same, being out of frictional contact with said hollow shaft. A is provided with a projecting sleeve, S,

having an external groove, t, in which Iplace i w f a loose collar, u, to which, by means of bolts,-

I attach an angular llange, w, carrying axed pin or key, m, projecting internally through a slot, n, in hollowshaft B, and4 xed inside the spindle R, as shown.

shaft, C, revolved by any suitable motor. By

The further end of drum Vheel E is cou-f stantly rotated by a pinion, F, on a counter- 1 throwing lever H to the left, (in Fig. 1,) the eccentric P forces stirrup O to the left, and with it spindle R, which, by means of the pin m, flange w, bolts, and loose collar u, draws the drum-cone away from friction-cone D, and the drum is then free to revolve in one direction, while the wheel E, hollow shaft B, clutching device, and spindle R are revolving in the opposite direction, spindle B being, or" course, swiveled in the stirrup O. To adjust the throw of the eccentric I construct the rock-shaft N with a notched collar, p, fixed thereon. collar p, and has a single notch in its face.

The lever H encircles this A cap or cover plate, g, is adapted to be se-` cured on the end of shaft N, having a lug, r,

which falls into one of the notches on collar p and' into the notch on lever H. If the position of lever H is desired to be changed, A

cap g is loosened and shaft Nor the lever H4 moved to the required position, and cap gre` set.

Having described my invention, I claiml. A friction drum hoist having` its drum loosely mountedy on a hollow shaft, in combi; nation with a clutch-operating spindle passingthrough said hollow shaft, and adapted to receive endwise thrust, and clutching Inechanism, substantially as described.

2. The combination, with drum A, having grooved sleeve S, and the rotating gear Eon slotted hollow shaft B, adapted to frictional contact with said drum, of the rocking shaft N, eccentric I), stirrup O, spindle l, liange w, loose'collar u, and pin m, connecting said IOO 

